Sales Chat - Click Here

Update on PHP2Shell Vulnerability: Security Patches and Service Restoration


Press Releases Oct 26, 2026

Following the recent discovery of a critical PHP vulnerability known as PHP2Shell, which affects certain Buffalo websites and services, we have been taking measures to address the vulnerability and ensure the security of our systems.

Security patches have now been applied to most affected websites, and operations have been gradually restored following security verification. To date, we have found no evidence of unauthorized access or information leaks resulting from this vulnerability. We will continue to closely monitor our systems and implement additional security measures as necessary to protect against potential threats.

Refer to the chart below for any remaining affected websites and services. We will continue applying security patches and verifying their safety before restoring operations and provide further updates on this page as new information becomes available.

We appreciate your understanding and patience as we continue working to maintain the security of our services.

Impact

Websites and Services

Name Status
Buffalo Website Resolved
VAR Partner Website Resolved
WebAccess Resolved
LinkStation/TeraStation Online Update Resolved
Remote Management Service Resolved
Net Threat Blocker / Net Threat Blocker 2 Resolved
i-Filter Resolved
UTM Resolved
Buffalo DDNS Resolved

Products

The following list covers products that are still within their support periods. Products whose support periods have ended are excluded from this list and impact assessment.

Market Product Category Series Status
Consumer Wi-Fi Routers All series No impact
Wi-Fi Range Extenders All series No impact
Wi-Fi Adapters All series No impact
Wired Routers All series No impact
Switching Hubs All series No impact
Wired LAN Adapters All series No impact
Consumer NAS and HDDs LS720D series
LS710D series
LS720D/N series
LS710D/N series
LS220DN series
LS210DN series
LS220DG series
LS210DG series
LS411DX series
No impact
Consumer NAS and HDDs LS520D series
LS510D series
LS520DG series
LS510DG series
Under investigation
Business Wi-Fi Access Points All series No impact
Business Routers All series No impact
Business Switching Hubs All series No impact
Business Management Tools WLS-ADT No impact
Business NAS and HDDs TS3210DN series
TS3410DN series
TS3410RN series
TS3220DN series
TS3420DN series
TS3420RN series
TS3230DN series
TS3430DN series
TS3430RN series
TS51210RH series
TS5210DF series
TS5210DN series
TS5410DN series
TS5410RN series
TS5610DN series
TS5810DN series
TS51220RHV2 series
TS51220RH series
TS5220DF series
TS5220DN series
TS5420DN series
TS5420RN series
TS5620DN series
TS5820DN series
TS6200DN series
TS6400DN series
TS6400RN series
TS6600DN series
TS71210RHV2 series
TS71210RH series
LS720DNB series
LS710DNB series
LS220DNB series
LS210DNB series
LS720D/N series
LS710D/N series
WS5220DNS2 series
WS5220DNS5 series
WS5220DNW2 series
WS5220DNW5 series
WS5420DNS2 series
WS5420DNS5 series
WS5420DNW2 series
WS5420DNW5 series
WS5420RNS2 series
WS5420RNS5 series
WS5420RNW2 series
WS5420RNW5 series
WS6210DNS5 series
WS6210DNW5 series
WS6410DNS5 series
WS6410DNW5 series
WSH5420DNS2 series
WSH5420DNS5 series
WSH5420DNW2 series
WSH5420DNW5 series
WSH5420RNS2 series
WSH5420RNS5 series
WSH5420RNW2 series
WSH5420RNW5 series
WSH5620DNS2 series
WSH5620DNS5 series
No impact
Business NAS and HDDs LS520DNB series
LS510DNB series
Under investigation

No impact has currently been identified for other websites, services, or products not listed in the tables above.

X